.down-box{
	display: none;
	position: absolute;
	z-index: 2;
	left: 0;
	width:  100%;
	top: 40px;
	background-color: #fff;
}

.down-box li{
	height: 40px;
	line-height: 40px;
	text-indent: 16px;
	font-size: 16px;
	border: 1px solid #D5D5D5;
	border-top:  none;
	cursor: pointer;
}


.down-box.active{
	display: block
}